Abrading roller



Sept. 20, 1938. P. G. AULSON ABRADING ROLLER Filed Jan. 16, 1937 Patented Sept. 20, 1938 UNITED STATES PATENT OFFICE ABRADING ROLLER Application January 16, 1937, Serial No. 120,854

2 Claims.

This invention relates to abrading rollers for use in various types of machines which are adapted for use in producing smooth surfaces on various materials as for instance, hides and leathers.

The main object of the invention is the provision of means for attaching the abrading sheet to the surfacing roller in such manner that when in use it will firmly contact with the entire peripheral wall of said roller and be so locked thereto that all slipping of said sheet thereon will be effectually prevented.

Another object of the invention is the providing of simple means whereby the sheet may be detached readily from the roller when it is desired to position another sheet thereon.

These objects are attained by the mechanism shown in the accompanying drawing.

For the purpose of illustrating the invention two preferred forms thereof are illustrated in the drawing, these forms having been found to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized, and the invention is not limited to the precise arrangement and organization. of these instrumentalities as herein shown and described except as required by the scope of the appended claims.

Of the drawing- Figure 1 represents an elevation of an abrading roller embodying the principles of the present invention with the abrading sheet omitted.

Figure 2 represents an end View of the same.

Figure 3 represents an enlarged sectional detail on line 3, 3 on Fig. 1, and showing the abrading sheet secured to the periphery of the roller.

Figure 4 represents a diagrammatical view of the sheet tightening shafts with an intermediate 40 supporting ear and other ears at the opposite ends of the roller associated with clamping means to independently lock each of the shafts in adjusted position.

Figure 5 represents an enlarged sectional detail of one of the end ears and the means for clamping the winding shaft in adjusted position.

Figure 6 represents a plan of a sheet of abrading material to be used on said roller, this figure being drawn to a reduced scale.

Figure 7 represents an elevation of a modified form of roller in which the sheet winding shafts are out of alinement and parallel to each other.

Figure 8 represents an enlarged sectional detail on line 8, 8 on Fig. '7.

55 Figure 9 represents a diagram of one of the sheet winding shafts tobe used in the modified form of roller with its supports at opposite ends thereof, and

Figure 10 represents a special form of abrading sheet to be used in connection with the modified form of roller shown in Fig. '7, this figure being drawn to a reduced scale.

Similar characters indicate like parts throughout the several figures of the drawing.

In the drawing, I0 is a revoluble shaft having mounted thereon a hollow metallic cylinder II.

This cylinder II has two peripheral slots l2 extending therethrough and preferably in alinemerit as shown in Fig. 1.

Between the inner ends of these slots I2 is an ear l3 extending inwardly from the inner wall of the cylinder II.

The cylinder l I also has extending inwardly from its inner wall and at its opposite ends ears l l, which ears have notches l5 formed therein.

The notches i5 have a width equal to the diameter of a shaft l6 adapted to be disposed at one end in the notch of an ear 14, said shaft I6 being retained in said notch l5 by means of a transverse pin ll extending across said notch.

The opposite end of this shaft I6 is disposed in a cylindrical hole in the intermediate ear 13, said ear l3 forming a lose bearing or support for the inner ends of both shafts I6.

Each shaft I6 is provided near its outer end with a flange I8 bearing against the inner wall of an ear [4.

Each shaft I6 is provided outside of the flange [8 with a thread IS on which is mounted a revoluble clamping nut 20.

Extending into the outer end of each shaft I6 is a fiat-sided socket 2i adapted to receive a wrench by which the shaft 16 may be rotated.

When the shaft I6 has been rotated sufliciently it may be locked in its adjusted position by turning the nut 20 on the thread l9 causing the flange E8 to impinge upon the inner face of the ear I4.

Each shaft I6 is provided with a longitudinal slot 22 between the ears l3 and I4.

Preferably the metallic cylinder is covered by a layer of yielding material 23, this material having slots 24 therein registering with the peripheral slots I2 in the metallic cylinder II.

A special form of abrading sheet 25 is used in connection as shown in Fig. 6.

The opposite ends of this sheet 25 are bifurcated leaving two projecting portions 26 to be inserted through the slots 24 of layer 23, the slots 12 in the cylinder H and the slots 22 in the shaft I6.

shown in Fig. 3, the shaft I6 may be rotated about its axis drawing the abrading sheet 25 tightly against the periphery of the roller and p then locked firmly in its adjusted position by means of the clamping nut 20.

The peripheral slots I2 are preferably formed in the cylinder I I diagonally to the rotating shaft I0 of the cylinder II.

Heretofore, short metal cylinders of this character with a single diagonally disposed peripheral slot therein have been used but when longer cylinders have been used it has been found that the abrading sheet 25 will bulge in the center of the roller and will not be held firmly against the periphery of said roller.

Obviously, this is very objectionable and this objection has been overcome by providing the intermediate ear [3 extending inwardly from the inner wall of the cylinder and forming a loose bearing or support for the abutting ends of two separate rotatable shafts I6 which may be rotated independently of each other with the projecting portions 26 of the abrading sheet 25 inserted therein.

By tightening this abrading sheet 25 in this manner and by utilizing two separate shafts l6, the entire surface of the abrading sheet 25 is held taut in contact with the peripheral wall of the cylinder II or the yielding covering 23 surrounding said cylinder II.

By making the rollers in the manner described the abrading sheet 25 may be retained firmly in contact with the roller at all points regardless of the length of said roller.

If V desired, the peripheral slots l2 in the cylinder I I may be out of alinement with each other but must be parallel with each other, as shown in Fig. 7.

In this modified form of roller two intermediate ears I3 are used each having a cylindrical hole therethrough to form a loose bearing or support for the inner end of one of the slotted shafts I6.

When the peripheral slots I2 are out of alinement, it is necessary to use a specially formed sheet 21 of abrading material, such as is shown in Fig. 10.

This sheet 21 is bifurcated at both ends leaving two projections 28 at opposite ends thereof, one projection at each end being longer than the other projection at that end.

One long projection 28 at one end of the sheet 21 and the shorter projection 28 at the opposite end of the sheet are inserted through the slot 22 of one shaft I6, and the other pair of projections 28 are inserted through the slot 22 of the other shaft I6 in the manner hereinbefore described.

Superior results are obtained by mounting the abrading sheets 25, 21 on the rollers in the manner described and this is particularly true when the rollers have considerable length as they must have in some types of machines.

It is believed that the operation and many advantages of the invention will be understood without further description.

Having thus described my invention, I claim:

1. An abrading roller having a hollow cylindrical metallic body provided with-two diagonally disposed peripheral slots extending toward each other from opposite ends thereof, said slots being parallel to and out of alinement with each other; an ear extending inwardly from the inner wall of said cylindrical body intermediate the ends thereof and at the inner end of each slot; ears at the opposite ends of said body extending inwardly and radially from the inner wall thereof; a slotted shaft rotatable in each end ear and one of said intermediate ears; an abrading sheet having at each end two projecting portions for insertion one in each peripheral slot and the slot of a rotatable shaft; means for rotating each slotted shaft; and means for locking each slotted shaft in adjusted position.

2. An abrading roller having a hollow cylindrical metallic body provided with two peripheral slots extending toward each other from opposite ends thereof, said slots being parallel to and out of alinement with each other; an ear extending inwardly from the inner wall of said cylindrical body intermediate the ends thereof and at the inner end of each slot; ears at the opposite ends of said body extending inwardly and radially from the inner wall thereof; a slotted shaft rotatable in each end ear and an intermediate car; an abrading sheet having at each end two projecting portions of different lengths for insertion one pair in each peripheral slot and the slot of a rotatable shaft; means for rotating each slotted shaft; and means for locking each slotted shaft in adjusted position.

PHILIP G. AULSON. 

